| Index | Posen | Illinois | National |
| Average Test Scores | 25% | 33% | 48% |
| Student/Teacher ratio | 23:1 | 18:1 | 16:1 |
| Total public schools | 3 | 3,938 | 79,221 |
| Total private schools | 1 | 1,438 | 24,874 |
| Total post-secondary schools | n/a | 306 | 7,963 |


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| Index | Posen | Illinois | National |
| Completed 8th grade | 75.7% | 86.2% | 84.3% |
| Completed high school | 71.2% | 84.7% | 83.0% |
| Completed some college | 35.8% | 61.8% | 59.4% |
| Completed associate degree | 16.7% | 40.7% | 38.5% |
| Completed bachelors | 11.0% | 32.9% | 30.3% |
| Completed masters | 2.3% | 12.7% | 11.5% |
| Completed professional degree | 0.0% | 3.4% | 3.3% |
| Completed doctorate | 0.0% | 1.2% | 1.3% |
There are a total of 3 public schools, 1 private schools and n/a post-secondary schools in Posen. Using the proficiency score averages, the average test scores for Posen, IL schools is 25%. The average student to teacher ratio is 23:1. In Posen, IL, an average of 75.7% of students have completed 8th grade and an average of 71.2% have completed high school.
| City | Population | Avg. Test Scores | National Avg. |
| Oak Brook, IL | 8,377 | 79% | 64.6% |
| Clarendon Hills, IL | 9,104 | 77% | 59.4% |
| Hinsdale, IL | 17,817 | 74% | 54.7% |
| Western Springs, IL | 13,775 | 74% | 54.4% |
| Munster, IN | 23,103 | 70% | 46.0% |
| Posen, IL | 6,000 | 25% | 49.0% |
| City | Population | Avg. Test Scores | National Avg. |
| Patterson, LA | 6,001 | 73% | 52.4% |
| Norwood, NJ | 6,003 | 68% | 41.7% |
| Moosic, PA | 6,005 | 47% | 2.1% |
| Clearfield, PA | 6,005 | 50% | 4.7% |
| Little Silver, NJ | 6,005 | 76% | 59.0% |
| Posen, IL | 6,000 | 25% | 49.0% |